subway delay presentation
DESCRIPTION
Presented in May 2015 at a meeting of the MTA's Transit Committee.TRANSCRIPT
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NYCT Subway Performance
Joseph Leader, Senior VP, Subways
Peter Cafiero, Chief, Operations Planning
May 2015
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Today, Subway performance is primarily challenged by growing
ridership, ongoing maintenance needs & unplanned events
1
Ridership is growing in peak and off-peak periods
Critical maintenance needs are growing and work often performed under train
traffic
Unplanned events do occur (e.g., power outages, water main breaks, signal
trouble) and also have a significant impact
on service
2014 Delays by Cause*
Planned Work26%
Unplanned Work22%
Crowding, Police, Sick Customer, etc.
40%
Other12%
*Delays February 2014-January 2015
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Incidents versus Delays: Impact of a given incident can vary widely by
time, line and location
2
168th St, 9:09 PM, 3/23/15, 22 minute
duration
72nd St, 4:35 PM, 11/4/14, 10 minute
duration
Example: Sick Customer Incident Delayed Trains(Number of trains rerouted or made 5 minutes late to the terminal by the incident)
A similar incident has a smaller
impact on a less busy line...
14 Trains Delayed
50th St, 6:08 PM, 7/29/14, 10 minute duration
72 Trains Delayed
and even less impact during the off peak.
3 Trains Delayed
-
Incidents vary in frequency and magnitude of impact
3
2014 Weekday Incidents, Major Categories
Incident DescriptionNo. of
Incidents
No. of Delays
(avg. per Incident)
Unplanned Work
Water Condition & Water Main Break 36 59
Track Conditions 548 33
Fire/Smoke Conditions 419 22
Signal Conditions 2,370 17
Door closing trouble (often crowding-related) 2,324 5
Planned Work 11,334 10
Crowding, Police, Sick Customers, etc 29,734 6
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Ridership is growing at all hours of the day and has exceeded 2008
levels in all hours
4
-
100,000
200,000
300,000
400,000
500,000
600,000
12 AM- 1 AM
1 AM -2 AM
2 AM -3 AM
3 AM -4 AM
4 AM -5 AM
5 AM -6 AM
6 AM -7 AM
7 AM -8 AM
8 AM -9 AM
9 AM -10 AM
10 AM-11 AM
11 AM-12 PM
12 PM- 1 PM
1 PM -2 PM
2 PM -3 PM
3 PM -4 PM
4 PM -5 PM
5 PM -6 PM
6 PM -7 PM
7 PM -8 PM
8 PM -9 PM
9 PM -10 PM
10 PM-11 PM
11 PM-12 AM
Weekday Subway Ridership by Hour
2007 2008 2009 2010 2011 2012 2013 2014
Source: OMB linked trips
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15 out of 20 lines are at peak track capacity, including ten lines
already at track and train (passenger carrying) capacity
5
Subway Track Capacity by Line - AM Peak Hour (Peak Direction)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1 2 3 4 5 6 7 A B C D E F G J Z L M N Q R
Capacity measured at the Peak Load Point, where trains carry the heaviest load in the peak hour
Peak Load Point for busiest direction on each line shown above
Colors indicate whether additional capacity is available
Red constrained in both track and train capacity (10 lines)
Yellow passenger capacity on existing trains but no track capacity to run more trains (5 lines)
Green both track and train capacity available (5 lines)
10
3 S
t
72
St
72
St
86
St
86
St
68
St
Exp
W
oodsid
e / L
oca
l
40
St
Ja
y S
t
7 A
v (
Bro
okly
n)
Ja
y S
t
36
St
Roo
se
ve
lt A
v
Roo
se
ve
lt Isla
nd
Gre
en
poin
t A
v
Ma
rcy A
v
Be
dfo
rd A
v
Elm
hu
rst A
v
Qu
ee
ns P
laza
Qu
ee
nsboro
Pla
za
Qu
ee
nsboro
Pla
za
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Heavy ridership affects system performance closely correlated with delays
6
500
1,000
1,500
2,000
2,500
3,000
3,500,000 4,000,000 4,500,000 5,000,000 5,500,000 6,000,000 6,500,000
Dela
ys P
er
Weekd
ay
Weekday Ridership
December 2014 Weekday Delays vs. Ridership
Close to Average
Daily Ridership
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We complete critical maintenance under traffic
We have increased the frequency of infrastructure, track and signal inspections
Every weekday, we average 400 work sites on the right of way, 150 of which occur between 9am and 4pm
75% of the work sites are for signals and track maintenance / repairs
We work in approximately 4-5 locations per line during off-peak periods
Amidst ridership challenges, planned work on the right of way is
essential to maintain a State of Good Repair
7
In 2003, 3,900 delayed trains were due to planned work (6%).
In 2014, 113,000 delayed trains were due to planned work (26%).
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Enhanced worker protection systems slow trains to protect workers
on tracks
Slow speeds (10 mph) past work sites ensure worker safety (flagging), but lower capacity
Flagging rule enhancements since 2003 have lengthened slow speed zones and have added slow speed protection on adjacent tracks
Current rules Total advance warning zone: 1,150ft
150 ft 1,000 ft720 ft
Current rules Clear at 720ft
8
Even one small work zone requires more than 1/3 of a mile of slow train speed
A typical slow speed zone reduces track capacity from 28 to 18 trains per track per hour
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Service Improvement Plan
9
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Service Delivery efforts focus on reliable, evenly-spaced service, as
measured by Wait Assessment
Wait assessment is the percent of intervals between
trains that are not more than scheduled interval +25%,
based on multiple observations in each trip
Wait assessment is a better measure of customer
service than delays or OTP because:
Unlike commuter rail, the vast majority of our riders are headway focused, not schedule
focused
Most customers ride only a portion of the line and do not ride terminal to terminal
WA is calculated along each line and provides a more comprehensive picture of customer
experience
10
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A Subway Delay Story
11
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Scheduled Service
Efforts to maintain evenness improve customer service, at the
expense of OTP
12
Diagram depicts train positions as they pass stations (vertical) over time (horizontal)
6 6
Time
Po
sitio
n a
lon
g tra
ins
jou
rne
y
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Efforts to maintain evenness improve customer service, at the
expense of OTP
13Only select dwells shown
Diagram depicts train positions as they pass stations (vertical) over time (horizontal)
Each plotted point represents the time that a train arrived in a station
Even train spacing is represented by parallel, evenly spaced string lines
Large spaces and nonparallel lines indicate uneven spacing, possibly due to incidents
6 6 Southbound 6 service, 12/22/14
Trains are mostly
evenly spacedSpacing is uneven
There are irregular gaps in
service
Southbound arrived
14th Street-Union Square
at 8:26 AM
6
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Efforts to maintain evenness improve customer service, at the
expense of OTP (cont.)
14
Train had an
incident at 125th
Street causing
a 13 minute
gap in service
Only select dwells shown6 6 Southbound 6 service, 12/22/14
Train dispatchers employ strategies to regulate train spacing, especially around an incident
Ahead of a delayed train, trains may be held to ensure a large gap in service does not follow
Once the incident has been cleared, trains may be instructed to skip stops to catch up and lessen train bunching
Service management actions typically help Wait Assessment, often at the expense of OTP
Trains ahead were held in
station to close the gap
from in front
The "incident train" and one train
behind it were instructed to skip
stations (no station stop shown) to
catch up and clear train congestion
Additional Delays due
to incident and service
actions
Holding helped some
intervals meet Wait
Assessment standard
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Subway Schedules - First comprehensive revision since 1990s, when
weekday ridership was equivalent to current Saturday ridership
1515
We have accelerated a thorough review of weekday schedules, will be fully implemented in 2015
Line-by-line, we are:
Updating running times
Providing terminal recovery times for arriving trains and crews to make return trips
Adjusting schedules to better manage:
Merges and terminal operations
Even headways
Adjustments for off-peak planned work
Will expand to weekend schedules in 2016
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2014 Delays*
Different lines are impacted by different factors, service and incident
management efforts vary by line
13% 11% 12%
52%
28%
40%
19%
26%
22%
16%
35%
26%
Planned Work
Unplanned Work
Crowding, Police,
Sick Customers, etc.
System
444,897100%
Other
A Division
223,794
B Division
221,103
16*Delays February 2014-January 2015
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We are launching initiatives to target primary challenges on specific lines,
based on wait assessment performance
Targeted Lines Based on Wait Assessment Decline:
Crowding and Service Management
Focus service management efforts on maintaining evenness of service (wait assessment)
Reduce dwell times at problematic locations (initial focus is primarily on 6 line)
Additional platform controllers, step aside boxes, and revising door announcements to speed door closing
Monitor platform crowding conditions via cameras and staged personnel and respond to real-time conditions
Improve communications during disruptions
Formalize partnership with NYPD to assist with platform metering during incident
17
Planned Work
Unplanned Work
Crowding, Police,
Sick Customers, etc.
Other
System Delays
-
Targeted Lines Based on Wait Assessment Decline:
Incident Prevention
Targeting highest incident locations and enhancing inspections
Increased ultrasonic testing
Aggressive Continuous Welded Rail installation
Incident Response
CAT Teams: Signals, Track and Third Rail teams strategically deployed for quick response
Lex Line Signals Coverage: signal staff staged along Lexington Corridor for accelerated response to incidents
Additional multi-discipline response personnel
Improved Coordination of Planned Work to Minimize Impact
Consolidate work planning to create multi-discipline work zones and decrease impact of planned work on service; targeting Lexington corridor for initial pilot implementation
18
We are launching initiatives to target primary challenges on specific lines,
based on wait assessment performance
Planned Work
Unplanned Work
Crowding, Police,
Sick Customers, etc.
Other
System Delays